Development of the Seal for Nuclear Material

Two kinds of double cap metallic seal and an adhesive seal are developed for the purpose of the accounting for and control of nuclear material.Two kinds of double cap metallic seal are made of stainless steel and copper, respectively and the self locked technique is used.The number and the random pattern is carved out side and in side of a cap, respectively, for the seal.The random pattern carved inside of a cap for seal is taken a picture using numeral camera and memorized in computer.Special software is developed for verification of the random pattern memorized in computer.The adhesive seal is made of special adhesive paper for purpose of security, and a special pattern guarded against falsification is printed on seal paper using ultraviolet fluorescent light technique.